Iran says Qassem Soleimani, the then-commander of the elite Quds Force of the Islamic Revolutionary Guard Corps (IRGC), was in Iraq’s capital Baghdad on a diplomatic mission when his convoy was destroyed by missiles fired from a US drone.
The letter said US governments have, for years, displayed an “excessive unilateralism” in their actions that has granted them the power to violate international laws and agreements.
The missive comes shortly ahead of the second anniversary of Soleimani’s killing on January 3.
Former US President Donald Trump, who ordered the killing, said at the time that Soleimani was “the world’s top terrorist” and “should have been terminated long ago”.
Iraqi commander Abu Mahdi al-Muhandis and several others were also killed in the attack.